Assignee
AVISTA LAB INC
US14 patents
Top patents by PatentIndex Score
US6497974B2Dec 24, 2002
Fuel cell power system, method of distributing power, and method of operating a fuel cell power system
AVISTA LAB INC90 citations97
US6387556B1May 14, 2002
Fuel cell power systems and methods of controlling a fuel cell power system
AVISTA LAB INC171 citations97
US6620538B2Sep 16, 2003
Method and apparatus for monitoring equivalent series resistance and for shunting a fuel cell
AVISTA LAB INC44 citations95
US6468682B1Oct 22, 2002
Ion exchange membrane fuel cell
AVISTA LAB INC78 citations95
US6428918B1Aug 6, 2002
Fuel cell power systems, direct current voltage converters, fuel cell power generation methods, power conditioning methods and direct current power conditioning methods
AVISTA LAB INC102 citations95
US6218035B1Apr 17, 2001
Proton exchange membrane fuel cell power system
AVISTA LAB INC123 citations95
US6716549B2Apr 6, 2004
Fuel cell having metalized gas diffusion layer
AVISTA LAB INC31 citations92
US6703155B2Mar 9, 2004
Power tap device, fuel cell stack, and method of dividing a fuel cell stack
AVISTA LAB INC25 citations91
US6703722B2Mar 9, 2004
Reconfigurable plural DC power source power system responsive to changes in the load or the plural DC power sources
AVISTA LAB INC141 citations88
US6383556B2May 7, 2002
Method for forming a membrane electrode diffusion assembly for use in an ion exchange membrane fuel cell
AVISTA LAB INC13 citations80
US6630259B2Oct 7, 2003
Fuel cell power system performing AC inversion, method of distributing AC power, and method of operating a fuel cell power system
AVISTA LAB INC9 citations73
US6467334B2Oct 22, 2002
Method for quickly rendering a MOS gas sensor operational, MOS gas sensor system, and fuel cell system
AVISTA LAB INC7 citations73
US6550304B2Apr 22, 2003
Method of compensating a MOS gas sensor, method of manufacturing a MOS gas sensor, MOS gas sensor, and fuel cell system
AVISTA LAB INC2 citations62
US6532792B2Mar 18, 2003
Method of compensating a MOS gas sensor, method of manufacturing a MOS gas sensor, MOS gas sensor, and fuel cell system
AVISTA LAB INC4 citations62